Some companies are still trying to make landlines happen, but it’s likely a losing battle—especially among Millennials. Cell-only households have grown 70% since 2010, and 44% of U.S. adults do not have landline telephones in their houses. Young consumers are leading the trend: 64% of 21-38-year-olds do not have landlines, compared to 45% of 39-50-year-olds, and 32% of 50-69-year-olds. Cell phone ownership is more ubiquitous than ever, but reportedly still “skews heavily” to Millennials and Xers. (GFK)